mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-18 15:51:11 +00:00
150 lines
3.8 KiB
C
150 lines
3.8 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
* Copyright (C) 2009 David Schleef <ds@schleef.org>
|
|
*
|
|
* gst1394clock.c: Clock for use by IEEE 1394 plugins
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "gst1394clock.h"
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (gst_1394_clock_debug);
|
|
#define GST_CAT_DEFAULT gst_1394_clock_debug
|
|
|
|
static void gst_1394_clock_class_init (Gst1394ClockClass * klass);
|
|
static void gst_1394_clock_init (Gst1394Clock * clock);
|
|
|
|
static GstClockTime gst_1394_clock_get_internal_time (GstClock * clock);
|
|
|
|
static GstSystemClockClass *parent_class = NULL;
|
|
|
|
/* static guint gst_1394_clock_signals[LAST_SIGNAL] = { 0 }; */
|
|
|
|
GType
|
|
gst_1394_clock_get_type (void)
|
|
{
|
|
static GType clock_type = 0;
|
|
|
|
if (!clock_type) {
|
|
static const GTypeInfo clock_info = {
|
|
sizeof (Gst1394ClockClass),
|
|
NULL,
|
|
NULL,
|
|
(GClassInitFunc) gst_1394_clock_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof (Gst1394Clock),
|
|
4,
|
|
(GInstanceInitFunc) gst_1394_clock_init,
|
|
NULL
|
|
};
|
|
|
|
clock_type = g_type_register_static (GST_TYPE_SYSTEM_CLOCK, "Gst1394Clock",
|
|
&clock_info, 0);
|
|
}
|
|
return clock_type;
|
|
}
|
|
|
|
|
|
static void
|
|
gst_1394_clock_class_init (Gst1394ClockClass * klass)
|
|
{
|
|
GstClockClass *gstclock_class;
|
|
|
|
gstclock_class = (GstClockClass *) klass;
|
|
|
|
parent_class = g_type_class_peek_parent (klass);
|
|
|
|
gstclock_class->get_internal_time = gst_1394_clock_get_internal_time;
|
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_1394_clock_debug, "1394clock", 0, "1394clock");
|
|
}
|
|
|
|
static void
|
|
gst_1394_clock_init (Gst1394Clock * clock)
|
|
{
|
|
clock->last_time = 0;
|
|
GST_OBJECT_FLAG_SET (clock, GST_CLOCK_FLAG_CAN_SET_MASTER);
|
|
}
|
|
|
|
/**
|
|
* gst_1394_clock_new:
|
|
* @name: the name of the clock
|
|
*
|
|
* Create a new #Gst1394Clock instance.
|
|
*
|
|
* Returns: a new #Gst1394Clock
|
|
*/
|
|
Gst1394Clock *
|
|
gst_1394_clock_new (const gchar * name)
|
|
{
|
|
Gst1394Clock *_1394clock =
|
|
GST_1394_CLOCK (g_object_new (GST_TYPE_1394_CLOCK, "name", name, NULL));
|
|
|
|
return _1394clock;
|
|
}
|
|
|
|
static GstClockTime
|
|
gst_1394_clock_get_internal_time (GstClock * clock)
|
|
{
|
|
Gst1394Clock *_1394clock;
|
|
GstClockTime result;
|
|
guint32 cycle_timer;
|
|
guint64 local_time;
|
|
|
|
_1394clock = GST_1394_CLOCK_CAST (clock);
|
|
|
|
if (_1394clock->handle != NULL) {
|
|
raw1394_read_cycle_timer (_1394clock->handle, &cycle_timer, &local_time);
|
|
|
|
if (cycle_timer < _1394clock->cycle_timer_lo) {
|
|
GST_LOG_OBJECT (clock, "overflow %u to %u",
|
|
_1394clock->cycle_timer_lo, cycle_timer);
|
|
|
|
_1394clock->cycle_timer_hi++;
|
|
}
|
|
_1394clock->cycle_timer_lo = cycle_timer;
|
|
|
|
result = (((guint64) _1394clock->cycle_timer_hi) << 32) | cycle_timer;
|
|
result *= 40;
|
|
|
|
GST_LOG_OBJECT (clock, "result %" G_GINT64_FORMAT, result);
|
|
} else {
|
|
result = GST_CLOCK_TIME_NONE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void
|
|
gst_1394_clock_set_handle (Gst1394Clock * clock, raw1394handle_t handle)
|
|
{
|
|
clock->handle = handle;
|
|
clock->cycle_timer_lo = 0;
|
|
clock->cycle_timer_hi = 0;
|
|
}
|
|
|
|
void
|
|
gst_1394_clock_unset_handle (Gst1394Clock * clock)
|
|
{
|
|
clock->handle = NULL;
|
|
}
|